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Commit d6a65fdc authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Nicholas Bellinger
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Target/sbc: Fix protection copy routine 



Need to take into account that protection sg_list
(copy-buffer) may consist of multiple entries.

Changes from v0:
- Changed commit description

Signed-off-by: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 9d8abf45

drivers/target/target_core_sbc.c

+8 −0
Original line number Diff line number Diff line
@@ -1074,12 +1074,19 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read, 
	struct scatterlist *psg;

	void *paddr, *addr;

	unsigned int i, len, left;

	unsigned int offset = 0;



	left = sectors * dev->prot_length;



	for_each_sg(cmd->t_prot_sg, psg, cmd->t_prot_nents, i) {



		len = min(psg->length, left);

		if (offset >= sg->length) {

			sg = sg_next(sg);

			offset = 0;

			sg_off = sg->offset;

		}



		paddr = kmap_atomic(sg_page(psg)) + psg->offset;

		addr = kmap_atomic(sg_page(sg)) + sg_off;
@@ -1089,6 +1096,7 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read, 
			memcpy(addr, paddr, len);



		left -= len;

		offset += len;

		kunmap_atomic(paddr);

		kunmap_atomic(addr);

	}